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💧 Freshwater Endangered 🌡️ Tropical

Mexican rivulus

Millerichthys robustus Miller & Hubbs, 1974
Max Length
4 cm
Max Weight
-
Lifespan
-
Trophic Level
3.1
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
10.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

Mexican rivulus (Millerichthys robustus), first described by Miller & Hubbs, 1974 is a tiny fish. Adults typically reach 4.00 cm in maximum length. It inhabits freshwater systems including rivers, streams, and lakes. It occurs in Tropical waters. It is broadly omnivorous, taking invertebrates, plant matter, and detritus. On the IUCN Red List, it is classified as Endangered.

Scientific Name
Millerichthys robustus
Authority
Miller & Hubbs, 1974
Habitat
Freshwater
Climate
Tropical
IUCN Status
EN
Max Length
4 cm
Trophic Level
3.1
Resilience
High
Vulnerability
10.00/100
Migration
Non-migratory
Salinity
0–0.5 ppt

🔬 Taxonomy

Genus
Millerichthys
Millerichthys
Species
Mexican rivulus
Millerichthys robustus

🐟 Physical Description

Physical description for Mexican rivulus is currently being compiled.

🌀 Behaviour

Behavioural data for Mexican rivulus is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous
Spawning Season
spring
Spawn Location
Substrate
Fertilization
External

🌍 Habitat & Distribution

Freshwater; demersal; non-migratory . Tropical Central America: Papaloapan and Coatzacoalcos river basins in Mexico.

🌿 Ecology

Zone Preferences
💧 Freshwater ⬇️ Benthic
Migration
Non-migratory
Trophic Level
3.1±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.00661 × L3.1 (TL)
Max TL
4cm

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Endangered
Assessment Date
2018

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
3.1
Predator
Climate Zone
Tropical
Described By
Miller & Hubbs, 1974

👥 Community & Contribute

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